qa/cephfs: add MDS_CLIENTS_BROKEN_ROOTSQUASH to ignorelist

[rishabh-d-dave]

MDS_CLIENTS_BROKEN_ROOTSQUASH is generated and expected by
test_rootsquash_nofeature but it hasn't be added to ignorelist as a
result of which QA code marks the job as failed even though all tests
finished running successfully.

Fixes: https://tracker.ceph.com/issues/66075

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[batrick]

I knew I'd forget to add that 🙄 ...

The other test_admin failures were masking this eventual clog failure so I didn't notice. Of course, I only proceeded with the #57192 merge because I observed the specific tests I added passed.

[batrick]

(Feel free to QA this yourself. I just add it to my future branch so I don't have to see those failures.)

[rishabh-d-dave]

@batrick

(Feel free to QA this yourself. I just add it to my future branch so I don't have to see those failures.)

I'll be doing a quick QA for this, along with 2 other PRs, using builds for recent main on shaman.

[batrick]

jenkins test make check

[batrick]

jenkins test make check arm64

[batrick]

jenkins test make check

[batrick]

jenkins test make check arm64

[batrick]

This PR is under test in https://tracker.ceph.com/issues/66086.

[vshankar]

Good catch

[rishabh-d-dave]

make check failed due to package issue - https://jenkins.ceph.com/job/ceph-pull-requests/135174/

[rishabh-d-dave]

jenkins test make check

[rishabh-d-dave]

unrelated issues - https://jenkins.ceph.com/job/ceph-pull-requests/135183/

[rishabh-d-dave]

jenkins test make check

[rishabh-d-dave]

QA run was successful - https://pulpito.ceph.com/rishabh-2024-05-17_04:50:48-fs:functional-main-testing-default-smithi/.